With the move of the strict/vars/config/warnings modules to the main perl
recipe, we need to RPROVIDE those modules to ensure that package dependencies
on those modules continue to work correctly.
(From OE-Core rev: fe88ae8605f22d9075e4200159aa66605ec36587)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>